Display panel and display apparatus

Abstract

Disclosed are a display panel and a display apparatus. The display panel includes: a base substrate, an anode layer, a cathode layer, an organic functional layer and cathode signal lines, wherein the anode layer is located on the base substrate; the cathode layer is located on the side of the anode layer that faces away from the base substrate, and the orthographic projection of the cathode layer on the base substrate overlaps with both a display area and a non-display area; the organic functional layer is located between the anode layer and the cathode layer, and the orthographic projection of the organic functional layer on the base substrate overlaps with the display area; the cathode signal lines are located on the side of the organic functional layer that is close to the base substrate, and the cathode signal lines are located in the non-display area.

What is claimed is: 
     
         1 . A display panel, being provided with a display area and a non-display area surrounding the display area, and comprising:
 a base substrate;   an anode layer arranged on the base substrate;   a cathode layer arranged on a side of the anode layer facing away from the base substrate, wherein an orthographic projection of the cathode layer on the base substrate overlaps orthographic projections of the display area and the non-display area on the base substrate;   an organic functional layer arranged between the anode layer and the cathode layer, wherein an orthographic projection of the organic functional layer on the base substrate overlaps the orthographic projection of the display area on the base substrate; and   a cathode signal line arranged on a side of the organic functional layer close to the base substrate, wherein the cathode signal line is arranged in the non-display area, an orthographic projection of the cathode signal line on the base substrate has an overlapping area and a non-overlapping area with the orthographic projection of the organic functional layer on the base substrate, the non-overlapping area comprises at least two sub-areas, two adjacent sub-areas of the at least two sub-areas are separated by a sub-area comprised in the overlapping area, and the cathode signal line is coupled to the cathode layer in the at least two sub-areas.   
     
     
         2 . The display panel according to  claim 1 , wherein the cathode signal line surrounds the display area. 
     
     
         3 . The display panel according to  claim 1 , further comprising: a pixel defining layer arranged on the side of the anode layer facing away from the base substrate; wherein the pixel defining layer comprises a first via hole arranged in the non-display area; and
 the cathode signal line is arranged on a side of the pixel defining layer close to the base substrate, and the cathode signal line is coupled to the cathode layer through the first via hole.   
     
     
         4 . The display panel according to  claim 3 , wherein the cathode signal line comprises:
 a first wire arranged on a same layer as the anode layer, and the first wire is coupled to the cathode layer through the first via hole.   
     
     
         5 . The display panel according to  claim 3 , wherein the cathode signal line comprises:
 a first wire, and a second wire arranged on a side of the first wire close to the base substrate;   the first wire is coupled to the cathode layer through the first via hole, and the first wire is coupled to the second wire through a second via hole; and the second via hole penetrates an insulating layer between the first wire and the second wire.   
     
     
         6 . The display panel according to  claim 5 , wherein the first wire is coupled to the second wire through a plurality of second via holes. 
     
     
         7 . The display panel according to  claim 5 , further comprising: a source and drain metal layer arranged on a side of the anode layer close to the base substrate, and a gate metal layer arranged on a side of the source and drain metal layer close to the base substrate;
 wherein the first wire is arranged on a same layer as the anode layer; and   the second wire is arranged on a same layer as the source and drain metal layer, or the second wire is arranged on a same layer as the gate metal layer.   
     
     
         8 . The display panel according to  claim 3 , wherein the cathode signal line comprises: a first wire, a second wire arranged on a side of the first wire close to the base substrate, and a third wire arranged on a side of the second wire close to the base substrate;
 the first wire is coupled to the cathode layer through the first via hole, and the first wire is coupled to the second wire through a second via hole; the second wire is coupled to the third wire through a third via hole; the second via hole penetrates an insulating layer between the first wire and the second wire; and the third via hole penetrates an insulating layer between the second wire and the third wire.   
     
     
         9 . The display panel according to  claim 8 , wherein the first wire is coupled to the second wire through a plurality of second via holes; and/or the second wire is coupled to the third wire through a plurality of third via holes. 
     
     
         10 . The display panel according to  claim 8 , further comprising: a source and drain metal layer arranged on a side of the anode layer close to the base substrate, and a gate metal layer arranged on a side of the source and drain metal layer close to the base substrate; wherein
 the first wire is arranged on a same layer as the anode layer, the second wire is arranged on a same layer as the source and drain metal layer, and the third wire is arranged on a same layer as the gate metal layer.   
     
     
         11 . The display panel according to  claim 1 , further comprising: a sealant structure arranged in the non-display area; wherein
 the sealant structure is arranged on a side of the cathode layer facing away from the base substrate; and   an orthographic projection of the sealant structure on the base substrate at least partially overlaps the orthographic projection of the cathode signal line on the base substrate.   
     
     
         12 . The display panel according to  claim 11 , further comprising: a pixel defining layer arranged on the side of the anode layer facing away from the base substrate, and a planarization layer arranged on a side of the anode layer close to the base substrate; wherein
 the non-display area is provided with a through groove penetrating the pixel defining layer and the planarization layer, and the through groove surrounds the display area; and   at least part of the sealant structure is arranged in the through groove.   
     
     
         13 . The display panel according to  claim 12 , wherein at least part of the cathode signal line is arranged in the through groove, and the orthographic projection of the cathode signal line on the base substrate is arranged within a range of an orthographic projection of the through groove on the base substrate;
 part of the cathode layer is embedded in the through groove and is in lap joint with the cathode signal line; and   the part of the cathode layer embedded in the through groove forms a groove surrounding the display area, and at least the sealant structure is arranged in the groove.   
     
     
         14 . The display panel according to  claim 12 , wherein a surface of a side of the sealant structure facing away from the base substrate is raised relative to a surface of a side of the cathode layer arranged outside the through groove and facing away from the base substrate. 
     
     
         15 . The display panel according to  claim 14 , further comprising: an inorganic layer arranged between the sealant structure and the cathode layer and covering the display area and the non-display area. 
     
     
         16 . The display panel according to  claim 15 , further comprising: a color film layer arranged on a side of the inorganic layer facing away from the base substrate; wherein
 the color film layer fills an area surrounded by the sealant structure; and   a surface of a side of the color film layer facing away from the base substrate is flush with a surface of a side of the sealant structure facing away from the base substrate.   
     
     
         17 . The display panel according to  claim 16 , further comprising: a cover plate arranged on the sides of the sealant structure and the color film layer facing away from the base substrate. 
     
     
         18 . The display panel according to  claim 12 , wherein the sealant structure is in a closed-ring shape surrounding the display area. 
     
     
         19 . The display panel according to  claim 18 , wherein the through groove and the sealant structure have a same shape, and the through groove is in a closed structure;
 wherein a shape of the display panel is an elliptical, round or rectangular.   
     
     
         20 . A display apparatus, comprising a display panel being provided with a display area and a non-display area surrounding the display area, wherein the display panel comprises:
 a base substrate;   an anode layer arranged on the base substrate;   a cathode layer arranged on a side of the anode layer facing away from the base substrate, wherein an orthographic projection of the cathode layer on the base substrate overlaps orthographic projections of the display area and the non-display area on the base substrate;   an organic functional layer arranged between the anode layer and the cathode layer, wherein an orthographic projection of the organic functional layer on the base substrate overlaps the orthographic projection of the display area on the base substrate; and   a cathode signal line arranged on a side of the organic functional layer close to the base substrate, wherein the cathode signal line is arranged in the non-display area, an orthographic projection of the cathode signal line on the base substrate has an overlapping area and a non-overlapping area with the orthographic projection of the organic functional layer on the base substrate, the non-overlapping area comprises at least two sub-areas, two adjacent sub-areas of the at least two sub-areas are separated by a sub-area comprised in the overlapping area, and the cathode signal line is coupled to the cathode layer in the at least two sub-areas.